Shock is a common complication of severe febrile illness, and worldwide aggressive correction with intravenous bolus therapy is recommended as the initial treatment. Nevertheless, the evidence supporting this approach remains weak. The only controlled trial of fluid resuscitation, Fluid Expansion as Supportive Therapy (FEAST), involving 3141 African children with severe febrile illness, including large groups with sepsis and malaria, called into question aggressive fluid resuscitation, demonstrating excess mortality in both bolus arms (albumin and saline) compared to no-bolus control, relative risk of morality in bolus versus control was 1.45(1.13-1.86, p=0.003). Excess mortality was consistent across all subgroups, being greatest in those with the most severe forms of shock and acidosis. Remarkably, despite earlier shock reversal in those receiving fluid boluses the excess mortality in the FEAST trial was caused by subsequent cardiovascular collapse and was not secondary to fluid overload.
These observations are intriguing warranting an in-depth understanding of host responses including those of the myocardium to fluid resuscitation and at the microvasacular level since the two maybe synergistic. Current studies are underway in ovine models of sepsis (‘FEAST-in-Sheep’) in Professor John Fraser’s laboratory, Brisbane to understand the mechanism of harm, gain further insights in host responses to fluid management, and re-define the optimal fluid and supportive inotrope/vasopressor management of septic shock.
Four years have elapsed since the publication of FEAST, yet World Health Organization continues to recommend fluid boluses for children managed in resource-poor hospitals, where there is no access to intensive care. These are the precise settings where the FEAST trial was conducted in order to inform management guidelines. In Africa alone, where one in 10 febrile child admissions present with shock, we have estimated that the current guidelines, if fully implemented, will result in ~5,600 and 33,000 excess deaths each year per million hospital admissions treated for shock.
6. Physiological and dose-finding studies
612121112125 4131516161611 498106106N =
Time(hrs)
4824126-841-20
CVP(cmH2O)
12
10
8
6
4
2
0
-2
CVP low at
admission
B
B=Bolus ~ 20-40mls/kg
Maitland et al Pediatr Crit Care (2005)
7.
8. Forest Plot
Choice of fluids for resuscitation: a systematic review:
Akech et al BMJ 2010
9. Perpetual funding crisis….
Major concerns raised in grant reviews:
Shock:
•Provide the evidence (ie relevant physiological
research) from paediatric literature
underpinning shock definition
Management:
• Show us the evidence that on which the fluid
management recommendations are based
12. Paediatric Recommendations:
Dellinger 2012
‘…… blood pressure alone is not a reliable endpoint
for assessing the adequacy of resuscitation.
However, once hypotension occurs, cardiovascular
collapse may soon follow. Thus, fluid resuscitation is
recommended for both normotensive and
hypotensive children in hypovolemic shock [542–
554]’’.
4 dengue papers, 1 malaria systematic review;
implementation (before after study designs) one
small RCT (India)
13. International Evidence for Paediatric Fluid
resuscitation guideline
Guidelines FOR THE WHOLE WORLD based on 2 retrospective
analyses from one hospital (Pittsburgh; 3O
referral ICU)
Patient population : survivors to ICU admission: that were ventilated & inotrope
dependant
Endpoint/outcome: Retrospective review of shock reversal and volumes of fluid
required in the first hour on down stream endpoints – need for fluid boluses,
inotropes etc.
First study:
5 year review: 34 children with septic shock ~ 7 children/yr
>=40mls/kg initial fluid resuscitation (9 children) associated with better
outcome (Carcillo et al, JAMA 1991)
Recommmended as the standard of care following publication.
15. International Evidence for Paediatric Fluid
resuscitation guideline
Second study:
10 year review of Septic shock (91 children) ~ 9 children/yr
Patient population : SURVIVED to ICU admission: ventilated &
inotrope dependant
Endpoint/outcome: Shock reversal by community physicians:
volumes of fluid required in the first hour
>60mls/kg over 15 mins (34 children): early reversal of shock improves
outcome; (Han Y et all, Pediatrics 2003)
Now recommended as the standard of care
Surviving Sepsis 2012 guideline graded 2C level of evidence
= Weak recommendation based on very poor evidence
17. Pragmatic trial
Severe malarial + acidosis
Undernutrition
Sepsis/shock
Cerebral malariaPneumonia
Meningitis/encephalitis
HIV
Severe malarial anaemia
18. Controlled trial of fluid resuscitation
(FEAST A)
Follow-up to 4 weeks (24 weeks if developed neurological sequelae by 4 weeks)
Clinical assessments at 1, 4, 8, 24, 48 hours and at 4 weeks
Impaired perfusion
Any one of:
•Cap refill > 2 secs,
•Severe tachycardia,
•temperature gradient
•weak pulse
Excluded: Gastroenteritis Severe malnutrition Non-medical admission (burns,trauma)
22. Mortality Excess with Boluses by Shock Definition
FEAST ACCM
(cold,
2 signs)
PALS
2010
Comp
WHO/ETAT
Mortality
PALS
2010
With every definition of shock, boluses were
associated with increased mortality
NEJM Oct 2011
WHO/ETAT
Mortality
Bolus= 48%
Control=20%
23. .
.
.
.
.
.
.
.
.
C u t o f f a t 3 g
H b < 3 g / d l
H b > = 3 g / d l
S u b t o t a l ( I- s q u a r e d = 0 . 0 % , p = 0 . 4 5 0 )
C u t o f f a t 4 g
H b < 4 g / d l
H b > = 4 g / d l
S u b t o t a l ( I- s q u a r e d = 0 . 0 % , p = 0 . 3 3 5 )
C u t o f f a t 5 g
H b < 5 g / d l
H b > = 5 g / d l
S u b t o t a l ( I- s q u a r e d = 2 . 9 % , p = 0 . 3 1 0 )
C u t o f f a t 6 g
H b < 6 g / d l
H b > = 6 g / d l
S u b t o t a l ( I- s q u a r e d = 0 . 0 % , p = 0 . 7 7 0 )
C u t o f f a t 7 g
H b < 7 g / d l
H b > = 7 g / d l
S u b t o t a l ( I- s q u a r e d = 0 . 0 % , p = 0 . 6 3 1 )
C u t o f f a t 8 g
H b < 8 g / d l
H b > = 8 g / d l
S u b t o t a l ( I- s q u a r e d = 0 . 0 % , p = 0 . 7 2 2 )
C u t o f f a t 9 g
H b < 9 g / d l
H b > = 9 g / d l
S u b t o t a l ( I- s q u a r e d = 0 . 0 % , p = 0 . 7 9 2 )
C u t o f f a t 1 0
H b < 1 0 g / d l
H b > = 1 0 g /d l
S u b t o t a l ( I- s q u a r e d = 0 . 0 % , p = 0 . 5 4 7 )
C u t o f f a t 1 1
H b < 1 1 g / d l
H b > = 1 1 g / d l
S u b t o t a l ( I- s q u a r e d = 0 . 0 % , p = 0 . 8 0 1 )
S u b g r o u p
1 . 7 4 ( 1 . 0 2 , 2 . 9 9 )
1 . 3 8 ( 1 . 0 3 , 1 . 8 4 )
1 . 4 5 ( 1 . 1 3 , 1 . 8 7 )
1 . 7 4 ( 1 . 1 1 , 2 . 7 3 )
1 . 3 3 ( 0 . 9 8 , 1 . 8 1 )
1 . 4 5 ( 1 . 1 2 , 1 . 8 7 )
1 . 7 1 ( 1 . 1 6 , 2 . 5 1 )
1 . 3 1 ( 0 . 9 3 , 1 . 8 4 )
1 . 4 7 ( 1 . 1 4 , 1 . 9 0 )
1 . 4 1 ( 1 . 0 1 , 1 . 9 9 )
1 . 5 3 ( 1 . 0 4 , 2 . 2 3 )
1 . 4 7 ( 1 . 1 4 , 1 . 8 9 )
1 . 5 3 ( 1 . 1 1 , 2 . 1 3 )
1 . 3 5 ( 0 . 9 0 , 2 . 0 2 )
1 . 4 6 ( 1 . 1 3 , 1 . 8 8 )
1 . 4 3 ( 1 . 0 6 , 1 . 9 2 )
1 . 5 9 ( 0 . 9 7 , 2 . 5 8 )
1 . 4 7 ( 1 . 1 4 , 1 . 9 0 )
1 . 4 3 ( 1 . 0 8 , 1 . 9 0 )
1 . 5 7 ( 0 . 8 7 , 2 . 8 2 )
1 . 4 6 ( 1 . 1 3 , 1 . 8 8 )
1 . 5 0 ( 1 . 1 4 , 1 . 9 7 )
1 . 1 9 ( 0 . 6 0 , 2 . 3 8 )
1 . 4 5 ( 1 . 1 3 , 1 . 8 8 )
1 . 4 8 ( 1 . 1 4 , 1 . 9 3 )
1 . 3 1 ( 0 . 5 2 , 3 . 2 8 )
1 . 4 7 ( 1 . 1 4 , 1 . 8 9 )
r is k ( 9 5 % C I )
R e la t iv e
5 3 / 2 1 7
1 6 2 / 1 8 2 2
2 1 5 / 2 0 3 9
7 9 / 4 5 0
1 3 6 / 1 5 8 9
2 1 5 / 2 0 3 9
1 0 1 / 6 5 5
1 1 4 / 1 3 8 4
2 1 5 / 2 0 3 9
1 1 4 / 8 3 0
1 0 1 / 1 2 0 9
2 1 5 / 2 0 3 9
1 3 1 / 9 8 7
8 4 / 1 1 3 6
2 1 5 / 2 1 2 3
1 5 0 / 1 1 7 8
6 5 / 8 6 1
2 1 5 / 2 0 3 9
1 7 2 / 1 3 6 8
4 3 / 6 7 1
2 1 5 / 2 0 3 9
1 9 0 / 1 5 5 9
2 5 / 4 8 0
2 1 5 / 2 0 3 9
1 9 9 / 1 7 4 8
1 6 / 2 9 1
2 1 5 / 2 0 3 9
b o l u s
E v e n t s ,
1 4 / 1 0 0
5 9 / 9 1 5
7 3 / 1 0 1 5
2 1 / 2 0 8
5 2 / 8 0 7
7 3 / 1 0 1 5
3 0 / 3 3 2
4 3 / 6 8 3
7 3 / 1 0 1 5
4 0 / 4 1 2
3 3 / 6 0 3
7 3 / 1 0 1 5
4 3 / 4 9 7
3 0 / 5 4 8
7 3 / 1 0 4 5
5 3 / 5 9 5
2 0 / 4 2 0
7 3 / 1 0 1 5
5 9 / 6 7 3
1 4 / 3 4 2
7 3 / 1 0 1 5
6 2 / 7 6 3
1 1 / 2 5 2
7 3 / 1 0 1 5
6 7 / 8 7 2
6 / 1 4 3
7 3 / 1 0 1 5
n o _ b o l u s
E v e n t s ,
1 . 7 4 ( 1 . 0 2 , 2 . 9 9 )
1 . 3 8 ( 1 . 0 3 , 1 . 8 4 )
1 . 4 5 ( 1 . 1 3 , 1 . 8 7 )
1 . 7 4 ( 1 . 1 1 , 2 . 7 3 )
1 . 3 3 ( 0 . 9 8 , 1 . 8 1 )
1 . 4 5 ( 1 . 1 2 , 1 . 8 7 )
1 . 7 1 ( 1 . 1 6 , 2 . 5 1 )
1 . 3 1 ( 0 . 9 3 , 1 . 8 4 )
1 . 4 7 ( 1 . 1 4 , 1 . 9 0 )
1 . 4 1 ( 1 . 0 1 , 1 . 9 9 )
1 . 5 3 ( 1 . 0 4 , 2 . 2 3 )
1 . 4 7 ( 1 . 1 4 , 1 . 8 9 )
1 . 5 3 ( 1 . 1 1 , 2 . 1 3 )
1 . 3 5 ( 0 . 9 0 , 2 . 0 2 )
1 . 4 6 ( 1 . 1 3 , 1 . 8 8 )
1 . 4 3 ( 1 . 0 6 , 1 . 9 2 )
1 . 5 9 ( 0 . 9 7 , 2 . 5 8 )
1 . 4 7 ( 1 . 1 4 , 1 . 9 0 )
1 . 4 3 ( 1 . 0 8 , 1 . 9 0 )
1 . 5 7 ( 0 . 8 7 , 2 . 8 2 )
1 . 4 6 ( 1 . 1 3 , 1 . 8 8 )
1 . 5 0 ( 1 . 1 4 , 1 . 9 7 )
1 . 1 9 ( 0 . 6 0 , 2 . 3 8 )
1 . 4 5 ( 1 . 1 3 , 1 . 8 8 )
1 . 4 8 ( 1 . 1 4 , 1 . 9 3 )
1 . 3 1 ( 0 . 5 2 , 3 . 2 8 )
1 . 4 7 ( 1 . 1 4 , 1 . 8 9 )
r is k ( 9 5 % C I )
R e la t iv e
5 3 / 2 1 7
1 6 2 / 1 8 2 2
2 1 5 / 2 0 3 9
7 9 / 4 5 0
1 3 6 / 1 5 8 9
2 1 5 / 2 0 3 9
1 0 1 / 6 5 5
1 1 4 / 1 3 8 4
2 1 5 / 2 0 3 9
1 1 4 / 8 3 0
1 0 1 / 1 2 0 9
2 1 5 / 2 0 3 9
1 3 1 / 9 8 7
8 4 / 1 1 3 6
2 1 5 / 2 1 2 3
1 5 0 / 1 1 7 8
6 5 / 8 6 1
2 1 5 / 2 0 3 9
1 7 2 / 1 3 6 8
4 3 / 6 7 1
2 1 5 / 2 0 3 9
1 9 0 / 1 5 5 9
2 5 / 4 8 0
2 1 5 / 2 0 3 9
1 9 9 / 1 7 4 8
1 6 / 2 9 1
2 1 5 / 2 0 3 9
b o l u s
E v e n t s ,
b o lu s r e d u c e s r is k b o l u s in c r e a s e s r i s k
1. 2 5 . 5 1 2 4
Control betterBolus better
Hb 3 g/dl
Hb 11g/dl
Did anaemia affect outcome?
Each level of Haemoglobin level
Maitland BMC Medicine 2013
24. Sepsis: Culture +ve or
Goldstein et al definition (& malaria negative)
Maitland Unpublished
25. Acute Kidney Injury:
Evidence fluid challenge beneficial?
Maitland Unpublished
Period <8 hours 8-<24 hrs 24-<48 hrs 48 hrs – 28 days Total
Distribution of
deaths over time
50 31 12 15 108
% deaths with
BUN≥20 mg/dl
46% 29% 11% 14% 100%
29. Shock reversal at one-hour&
:
does not predict benefit
Bolus combined No Bolus Total
¥
Relative risk*
No shock at
one hour 43/876 (5%) 8/323 (2%) 51/1198 (4%)
1.98
(0.94-4.17)
Continued
shock at one
hour 141/1180(12%) 50/701 (7%) 191/1881(10%)
1.67
(1.23-2.28)
&
One-hour time point chosen since no difference in deaths in
bolus vs control arms ie result not influenced by survivorship bias
*p-value for heterogeneity between the two relative risks. = 0.68
30. 1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
Cumulativeincidence(%)
0 4 8 12 16 20 24 28 32 36 40 44 48
Hours until death
Cardiogenic (Bolus)
Cardiogenic (No Bolus)
Neurological (Bolus)
Neurological (No Bolus)
Respiratory (Bolus)
Respiratory (No Bolus)
Unknown/Other (Bolus)
Unknown/Other (No Bolus)
Percentage of death in Bolus (B) vs Control (C) with Terminal Clinical Event attributed to:
Cardiogenic/shock: 4.6%(n=96) B vs 2.6%(n=27) C [Ratio 1.79 (1.17-2.74) p=0.008]
Neurological: 2.1%(n=44) B vs 1.8%(n=19) C [Ratio 1.15 (0.67-1.98); p=0.6]
Respiratory: 2.2%(n=47) B vs 1.3%(n=14) C [Ratio 1.68 (0.93-3.06); p=0.09]
‘Terminal Clinical Event’:
Cumulative incidence of mortality for bolus & control arms
36. Response to fluid loading in severe
malnutrition(AFRIM)
And MAPS study
Dr Nchafatso Obonyo
• Management of Paediatric Shock
– Observational study in severe malnutrition:
• Myocardial and haemodynamic response to bolus fluid
resuscitation (current WHO treatment guideline)
• Risk factors for myocardial dysfunction
– Non-malnourished children:
• Gastroenteritis and dehydration + hypovolemic shock
• Severe febrile illness and septic shock (FEAST trial criteria)
• One-year Fellowship in Global Health
39. Myocardial Function
in severe malnutrition
Bernadette Brent
• Detailed assessment comprising:
– Clinical examination
– ECG (including holter ECGs over 7 days)
– ECHO
• Assessment time points:
– Admission
– Day 7
– Day 28
– Any deterioration
– Any IV fluids
40. Summary
Shock present?
20 mls/kg 0.9% saline rapidly, repeat x 2
Rehydration: Plan C
<30ml/kg over 1 hr then 70ml/kg over 3
hrs Ringers Lactate (or 5 hrs if <12m)
(no subtraction of bolus volume)
Overall
No shock: 100 mls/kg ~ 3-5 hrs;
If shock present: 120-160mls/kg ~ 4-5 hrs
(approximately 2-3 times a child’s
circulating volume).
6 hours: If still dehydrated: Restart Plan C
44. Annual excess mortality of boluses predicted per 1 million doses
Kiguli et al , BMJ 2014
5, 200- 132, 000 excess deaths/year for 4 million fluid boluses in children
with severe malaria whilst WHO continue to recommend boluses
45. Time for a bit of knowledge
translation?
Lancet January 2014
49. Factorial design: 3950 children
with severe anaemia
•Transfusion strategies
•Long-term management
MalawiUganda
TRansfusion and TReatment of severe Anaemia
in African Children Trial
50. Children’s Oxygen Administration
Strategies Trial (COAST)
PI: Kath Maitland
!
Uganda
Niger
Innovations: ‘Frugal’ technologies
High Flow (PEP): sustainable resource for
respiratory support
John Fraser
Fisher and Paykel
Brisbane Respiratory Group
Kathy Rowan
51. POST: First patient enrolled
EIT: lung recruitment of
oxygenation strategies
52. Clinical trials platform: Added value
Clinical trials facility
GCP compliant trials
East African collaborative
research & capacity buildingLinked sample collection:
basic research
Editor's Notes
Most emergency treatments have poor evidence base – however high quality trials produce important results- two of largest trials conducted in Africa in severely ill children – changed guidelines
Other components to ABC/Ssurviving sepsis for Africa kids - aspects of care not delinated thought clinical trials…..and the FEAST trial shows why we need to do more trials..
Fluid Resuscitation is the medical practice of intravenously replenishing bodily fluid that has been lost through the disease/infection process. First study was in intensive care but second in 2003 helped push fluid resuscitation to be used more in A&Es.
Fluid Resuscitation is the medical practice of intravenously replenishing bodily fluid that has been lost through the disease/infection process. First study was in intensive care but second in 2003 helped push fluid resuscitation to be used more in A&Es.
These were the common conditions included in the trial
Large enough numbers for a definitive answer at the end of the trial
In very single subgroups boluses were harmful
One question was whether the definition of shock used in the trial was different to others. We published this in a letter…with new data
In particular using the strict WHO shock definition, which only applied to a small number of children in the trial, there was a significant 28% excess mortality associated with boluses.
We have presented this before…at all levels of haemoglobin, boluses were harmful
Further analyses:
Next looking at bedside observations,….amongst all of them, only impaired perfusion was statistically different at one hour. This is consistent with global experience- children ‘get better’ on boluses!
We could only look early on as later, the difference in mortality between the bolus and control arms would result a biased result (survivorship bias).
Finally looking at terminal clinical events classified by ERC chair and member, blind to trial arm……
The biggest difference is with cardiogenic shock…ongoing shock and cardiac collapse was most significantly different between bolus and control
In very single subgroups boluses were harmful
These were the common conditions included in the trial
Large enough numbers for a definitive answer at the end of the trial
Most emergency treatments have poor evidence base – however high quality trials produce important results- two of largest trials conducted in Africa in severely ill children – changed guidelines
Other components to ABC/Ssurviving sepsis for Africa kids - aspects of care not delinated thought clinical trials…..and the FEAST trial shows why we need to do more trials..
Transfusion strategies in 4000 children with severe anaemia- who to transfuse and how much….
Factorial design transfusion management and long-term management (infection prophylaxis) and micronutrient support: Uganda and Malawi